/usr/lib/dracut/modules.d/40network/netroot.sh is in dracut-network 040+1-1.
This file is owned by root:root, with mode 0o755.
The actual contents of the file can be viewed below.
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 | #!/bin/sh
PATH=/usr/sbin:/usr/bin:/sbin:/bin
command -v getarg >/dev/null || . /lib/dracut-lib.sh
command -v setup_net >/dev/null || . /lib/net-lib.sh
# Huh? Empty $1?
[ -z "$1" ] && exit 1
# [ ! -z $2 ] means this is for manually bringing up network
# instead of real netroot; If It's called without $2, then there's
# no sense in doing something if no (net)root info is available
# or root is already there
[ -d $NEWROOT/proc ] && exit 0
[ -z "$netroot" ] && exit 1
# Set or override primary interface
netif=$1
[ -e "/tmp/net.bootdev" ] && read netif < /tmp/net.bootdev
case "$netif" in
??:??:??:??:??:??) # MAC address
for i in /sys/class/net/*/address; do
mac=$(cat $i)
if [ "$mac" = "$netif" ]; then
i=${i%/address}
netif=${i##*/}
break
fi
done
esac
# Figure out the handler for root=dhcp by recalling all netroot cmdline
# handlers when this is not called from manually network bringing up.
if [ -z "$2" ]; then
if [ "$netroot" = "dhcp" ] || [ "$netroot" = "dhcp6" ] ; then
# Load dhcp options
[ -e /tmp/dhclient.$netif.dhcpopts ] && . /tmp/dhclient.$netif.dhcpopts
# If we have a specific bootdev with no dhcpoptions or empty root-path,
# we die. Otherwise we just warn
if [ -z "$new_root_path" ] ; then
[ -n "$BOOTDEV" ] && die "No dhcp root-path received for '$BOOTDEV'"
warn "No dhcp root-path received for '$BOOTDEV' trying other interfaces if available"
exit 1
fi
# Set netroot to new_root_path, so cmdline parsers don't call
netroot=$new_root_path
# FIXME!
unset rootok
for f in $hookdir/cmdline/90*.sh; do
[ -f "$f" ] && . "$f";
done
else
rootok="1"
fi
# Check: do we really know how to handle (net)root?
[ -z "$root" ] && die "No or empty root= argument"
[ -z "$rootok" ] && die "Don't know how to handle 'root=$root'"
handler=${netroot%%:*}
handler=${handler%%4}
handler=$(command -v ${handler}root)
if [ -z "$netroot" ] || [ ! -e "$handler" ] ; then
die "No handler for netroot type '$netroot'"
fi
fi
# Source netroot hooks before we start the handler
source_hook netroot $netif
# Run the handler; don't store the root, it may change from device to device
# XXX other variables to export?
if $handler $netif $netroot $NEWROOT; then
rm -f -- $hookdir/initqueue/finished/dhcp.sh
# Network rootfs mount successful - save interface info for ifcfg etc.
save_netinfo $netif
fi
exit 0
|